Dec 12, 2011. /Lesprom Network/. Swanson Group Manufacturing LLC announced that it would take downtime from December 23 through January 3 at all four of its manufacturing facilities, and cautioned that there likely would be more to follow in the next several months, as Random Lengths reported. The company has sawmills in Glendale and Roseburg, Oregon, USA, and plywood facilities in Glendale and Springfield, Oregon, USA. The company attributed the shutdowns to a combination of depressed product prices and high log costs.